In the intestine, ensure(s) that most digested nutrients pass through the epithelial cells and not between them.

Tight junction

Explanation:

Tight junctions have the ability to seal or prohibit epithelial cells in the adjacent areas from passing molecules and ions through the inter cellular space.

The tight junctions consists of a network of proteins and claudins.

Claudins are also a set of proteins that expresses in epithelia and endothelia They also for paracellular barriers which are significant of tight junctions.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.